Source databases and data changes

Last Updated: Feb 20, 2020

You can use DTS to retrieve incremental data from user-created MySQL databases, and
ApsaraDB RDS for MySQL instances in real time. This feature applies to the following
scenarios: cache updates, business decoupling, asynchronous data processing, real-time
synchronization of heterogeneous data, and real-time synchronization of extract, transform,
and load (ETL) operations.

Change tracking (previous)

Source database

Data change type

ApsaraDB RDS for MySQL

5.5, 5.6, and 5.7

Data update

Data updates are operations that modify data, such as INSERT, DELETE, and UPDATE operations.

Schema update

Schema updates are operations that modify the schema syntax, such as CREATE TABLE
and ALTER TABLE operations.

Change tracking (new)

The previous change tracking feature requires high costs. To improve user experience
and reduce costs, Alibaba Cloud has upgraded the change tracking feature to achieve
repeated consumption of data across multiple downstream instances. For more information,
see Change tracking (new).

Note A source database, such as MySQL, can be one of the following types: User-Created Database with Public IP Address, User-Created Database in ECS Instance, and User-Created Database Connected Over Express Connect, VPN Gateway, or Smart Access
Gateway.

Source database

Data change type

User-created MySQL database

5.1, 5.5, 5.6, 5.7, and 8.0

Data update

Data updates are operations that modify data, such as INSERT, DELETE, and UPDATE operations.

Schema update

Schema updates are operations that modify the schema syntax, such as CREATE TABLE
and ALTER TABLE operations.